Improvement in rotary pumps



HANSON P. TENANT, OF EAST GERBIANTOVVN, INDIANA, ASSIGNOR TO HIMSELF, JACCB SPENGE, AND HENRY M. SOVERS, OF SAME PLACE.

Letters Patent No. 115,254, dated May 23, 1871.

MPROVEMENT IN ROTARY PUMPS.

The Schedule referred to in these Letters Patent and making part of the sammy I, Basson l). Tnx-tsr, ot" East Germantown, Myne county, Indiana, have invented an improved Rotary Pump, of which the following is a speeitieation.

Nature and Objects of the Inrcntion.

This invention relates to a rotary pump, which consists essentially of au inclosing-ease or shell, au inner cylinder which contains the rotating disk and reciprocating piston, two abutments, and a receiving and discharging-pipe, the details of the apparatus being hereinafter fully described.

Description of the Accompanying Drawing.

Figure lis a view ot a rotary pump embodying my improvements, the shell, cylinder', induction and eduction-pipes beingr shown in vertical section, and the rotating disk, with its sliding pistons, being shown in elevation Figure 2 is an elevation of the case and cylinder, fwith the cap detached and the operative parts removed so as to espose one ot" the grooves which aetnates the sliding pistons;

Figure 3 is a vertier! section ofthe pump at the line X, X; and

Figure 4 is an enlarged perspective view of one of the pistons and a portion ot' one of the actuating ceeentrie grooves.

General Description.

The inelosing-casc or shell consists of a rectangular vessel, A, with which there is east the circular iiange i3 that constitutes the cyiinder ol' the pump.

Projecting: inwardly from the iiange B are twoabutments, C and l), whose limetious will be hereafter described.

lThe operative parts ol` the pump are secured in position by a cap, ll, which is attached to the shell by bolts l".

.lonrnaled within the shell A and Cap li, so as to occupy an axial position with reference to the cylinder B, is the drivinf-shal't (i, to which is secured a disk or wheel, ll, 'which is i'nruished with a number ot' radial slots, la, that are. traversed by the reciproeating pistons l.

These pistons may, ii' preferred, be fnrnislwdwith a packing, l, ol leather, india rubber, or other snitalxle material, which may be retained in position by plate .lt and screws r, as .seen in iig. 4.

ly simply tightening up the screws r the packing muy he compressed .so as to project a slight distance beyond the three working,r faces ot the pistons, and thus aii'ord an elastic and at the same time a watertghtjoint between said pistons and the interior o1' the shell and cylinder.

'lhc inner ends of these pistons are furnished with .stud-shafts i, which aiibrd journal-bearings for rollers-J.

These rollers J play within groovesh'. that are formed on the inner sides ot' the shell A and cap E, as shown in tig. 3.

lhe grooves K are vprovided with portions L that; are concentric with the shalt Ur, and portions k' that are eccentric therewith.

The eccentric portions are arranged so as to cause the pistons .l to clear the ahutments C and l) at the proper moment.

lu order to reduce the friction to a minimum, and to render the wear ot' the operative parts as slight as possible, the actuating grooves, instead ot' being formed in the shell and cap, are turned in steel plates S, which can be tittcd in said shell and cap. This arrangement ot' the groove is clearly seen in 4.

L is the inlet-pipe, which is provided with a check- `valve, I.

M is the discharge-pipe.

ln iigsxl aud 25 the inlet-pipe is shown as continuing from the shell or case into the cylinder; but, it prclerreih'thc communication between the two may be broken, as shown in iig. 2, in which ease tbc space N between the interior ot the ease and the exterior of the cylinder would serve its a priming and vacuumchamber.

O is the driring-pnlley.

Operation.

4around :t sutlielent. distance by the pistons, is expelled through the pipe M.

l do not claim, broadly, vconstructing :i rotary pump with a re.'ol\iu r disk haringr radial slots in which the pistons or valves are reciprocated by studs or projections at their inner ends, movil f in au eccentric `more or between eccentric prop tions within the pnmp-casf; nor do t claim the employment nl rollers `iourualed ou such projections, all these haring been ltnown and used bet'ore -but l do claim- A rotary pump consisting; ol` the Irooted plates S fitting iulo the. cani-groove h', shell A, cylinder l, abutments l), ratlialiv-slotteil disk il, and pistons l l provided with packing coinpressible by means ot' plate It, and :uljusting-sercws r r, all constructed, arranged, and operated in the manner and for the purpose set iort'h.

1n testimony of which invention I hereunto set my baud.

Witnesses c Gannon S. NEFF, M An'ris SNAncn r. 

